Java Decompress Byte Array decompress(byte[] data)

Description

decompress

License

Open Source License

Declaration

public static byte[] decompress(byte[] data) 

Method Source Code

//package com.java2s;
/*//from  www. ja  v a2 s  . c  om
 * Copyright (c) 2007-2010 by The Broad Institute, Inc. and the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * This software is licensed under the terms of the GNU Lesser General Public License (LGPL), Version 2.1 which
 * is available at http://www.opensource.org/licenses/lgpl-2.1.php.
 *
 * THE SOFTWARE IS PROVIDED "AS IS." THE BROAD AND MIT MAKE NO REPRESENTATIONS OR WARRANTIES OF
 * ANY KIND CONCERNING THE SOFTWARE, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, OR THE ABSENCE OF LATENT
 * OR OTHER DEFECTS, WHETHER OR NOT DISCOVERABLE.  IN NO EVENT SHALL THE BROAD OR MIT, OR THEIR
 * RESPECTIVE TRUSTEES, DIRECTORS, OFFICERS, EMPLOYEES, AND AFFILIATES BE LIABLE FOR ANY DAMAGES OF
 * ANY KIND, INCLUDING, WITHOUT LIMITATION, INCIDENTAL OR CONSEQUENTIAL DAMAGES, ECONOMIC
 * DAMAGES OR INJURY TO PROPERTY AND LOST PROFITS, REGARDLESS OF WHETHER THE BROAD OR MIT SHALL
 * BE ADVISED, SHALL HAVE OTHER REASON TO KNOW, OR IN FACT SHALL KNOW OF THE POSSIBILITY OF THE
 * FOREGOING.
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import java.util.zip.Inflater;

public class Main {
    public static byte[] decompress(byte[] data) {
        return decompress(data, data.length * 4);
    }

    /**
     * @param data                  -- the data to decompress
     * @param uncompressedChunkSize -- an estimate of the uncompressed chunk size.  This need not be exact.
     * @return
     */
    public static byte[] decompress(byte[] data, int uncompressedChunkSize) {

        // mpd: new code
        int rem = data.length;

        // Create an expandable byte array to hold the decompressed data
        ByteArrayOutputStream bos = new ByteArrayOutputStream(uncompressedChunkSize);

        // Decompress the data
        byte[] outbuf = new byte[uncompressedChunkSize];

        Inflater decompressor = new Inflater();
        decompressor.setInput(data);
        while (rem > 0) {

            // If we are finished with the current chunk start a new one
            if (decompressor.finished()) {
                decompressor = new Inflater();
                int offset = data.length - rem;
                decompressor.setInput(data, offset, rem);
            }

            try {
                int count = decompressor.inflate(outbuf, 0, outbuf.length);
                rem = decompressor.getRemaining();
                bos.write(outbuf, 0, count);

            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        try {
            bos.close();
        } catch (IOException e) {
            // Ignore -- no resources open
        }

        // Return the decompressed data
        return bos.toByteArray();
    }
}

Related

1. decompress(byte[] compressedData, int off, int len)
2. decompress(byte[] data)
3. decompress(byte[] data)
4. decompress(byte[] data)
5. decompress(byte[] data)
6. decompress(byte[] data)
7. decompress(byte[] data)
8. decompress(byte[] data, int off, int len)
9. decompress(byte[] data, int offset, int length)